Ultrafast optical response in a quasi-one-dimensional halogen-bridged mixed-valence complex [Pt(en)2][PtBr2(en)2](ClO4)4

H. Ooi, M. Yamashita, T. Kobayashi

研究成果: Article査読

25 被引用数 (Scopus)

抄録

Ultrafast optical response in a quasi-one-dimensional halogen-bridged mixed-valence complex [Pt(en)2][PtBr2(en)2](ClO4)4 (en=ethylenediamine) has been investigated by femtosecond absorption spectroscopy at room temperature using pump-probe spectroscopy. The photo-induced absorption around 1.3 eV and the bleaching from 1.5 eV to 2.7 eV were observed. Both consist of a fast-decay component due to STEs and a slow-decay component due to polaron pairs. The former decays exponentially with the time constant of 1.4±0.1 ps. The latter decays as erf(tβ) with β =-0.22±0.02, indicating the geminate recombination of an electron polaron and a hole polaron after moving freely along the chain. The deviation of β from the ideal random-walk model (β= -0.5) is explained by introducing the effect of potential barrier between the polarons hindering the recombination.

本文言語English
ページ(範囲)789-793
ページ数5
ジャーナルSolid State Communications
86
12
DOI
出版ステータスPublished - 1993 6
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 凝縮系物理学
  • 材料化学

フィンガープリント

「Ultrafast optical response in a quasi-one-dimensional halogen-bridged mixed-valence complex [Pt(en)<sub>2</sub>][PtBr<sub>2</sub>(en)<sub>2</sub>](ClO<sub>4</sub>)<sub>4</sub>」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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